ILOILO CITY: The city health office here issued an alert on the rise of dengue cases during summer months, compared to cases during the same period of January to April 2015. City health officer Urminico Baronda said registered cases of dengue fever for the first four months this year reached 212 cases with no death, compared to 89 cases last year. He also alerted residents on the early onset of the rainy season being prone to breeding of mosquitoes carrying the dengue virus. Clean surrounding is a must against the proliferation of aedes egypti and aedes albopictos, dengue carrying mosquitoes. Of the recent cases, the number per district are 37 each in Jaro I and Jaro II; 33 each in Mandurriao and Arevalo; 26 in La Paz; 20 in Molo; 13 in Lapuz-Bo. Obrero; eight in Tanza city proper and five in Santo Rosario city proper. In January 2016, there are 79 cases as compared to 14 cases in 2015; 53 cases in Feb. 2016 as against 13 cases in Feb. 2015; 51 cases in March 2016 with 31 cases, for the same month in 2015; and 29 cases in April 2016 as compared to 31 cases in April 2015.